SI4548-US-10 Manual
Table Of Contents
- 1 Information on this Manual
- 2 Sunny Island 4548-US/6048-US
- 3 Safety Precautions
- 4 Assembly
- 5 Opening and Closing
- 6 Electrical Connection
- 7 Control Elements
- 8 Initial Start-Up
- 9 Switching On and Off
- 10 Operation
- 11 Archiving Data on an SD Card
- 12 Additional Functions
- 12.1 Load Shedding
- 12.2 Sleep Mode
- 12.3 Time-Controlled Operation
- 12.4 Overload and Short-Circuit Behavior
- 12.5 Mixed Operation with Sunny Island inverters of Different Power
- 12.6 Device Faults and Autostart
- 12.7 Automatic Frequency Synchronization
- 12.8 Time-Controlled Standby
- 12.9 Behavior in the Event of a Failure in a Three-Phase System
- 13 Battery Management
- 14 Connecting External Sources
- 14.1 Generator
- 14.1.1 Parallel Connection
- 14.1.2 Generator Start Options
- 14.1.3 Generator Operation
- 14.1.4 Manual Generator Operation
- 14.1.5 Automatic Generator Operation
- 14.1.6 Limits and Power Control
- 14.1.7 Run Times
- 14.1.8 Operation Together with PV Inverters and Wind Power Inverters
- 14.1.9 Stopping the Generator
- 14.1.10 Stopping the Sunny Island
- 14.1.11 Disturbances
- 14.2 Grid
- 14.2.1 Limits of the Voltage Range and Frequency Range
- 14.2.2 Starting the Sunny Island
- 14.2.3 Operation in the Event of Grid Failure in a Grid-Tie Backup Configuration
- 14.2.4 Backup Operation and Anti-Islanding
- 14.2.5 Grid Reconnection
- 14.2.6 Grid Operation
- 14.2.7 Grid Failure
- 14.2.8 Disturbances
- 14.2.9 Limits and Power Control
- 14.2.10 Operation Together with PV Inverters and Wind Power Inverters
- 14.3 Generator and Grid
- 14.1 Generator
- 15 Relays
- 16 Multicluster Operation
- 16.1 Communication between the Sunny Island inverters
- 16.2 Initial Start-Up of the Multicluster System
- 16.3 Switching a Multicluster System On and Off
- 16.4 Generator Operation
- 16.5 Behavior with Different States of Charge
- 16.6 Testing the Multicluster Communication
- 16.7 Automatic Frequency Synchronization
- 16.8 Updating the Firmware
- 16.9 Error Handling in the Multicluster System
- 16.10 Grid Operation
- 16.11 Generator Emergency Operation
- 17 PV Inverters
- 18 Maintenance and Care
- 19 Parameter Lists
- 20 Troubleshooting
- 21 Accessories
- 22 Technical Data
- 23 Glossary
- 24 Contact
SMA America, LLC 13 Battery Management
Technical description SI4548_6048-US-TB_en-13 113
13.4.5 Silent Mode
In addition to the float charge, the silent mode can only be used ("224.01 SilentEna" parameter)
when operating with the utility grid in the operating mode "GridCharge".
The main purpose of the silent mode is to save energy by switching from charge mode to standby
mode in backup systems where the Sunny Island is predominantly in float charge.
The silent mode is activated after the time set for float charge ("224.02 SilentTmFlo" parameter) has
expired. The Sunny Island remains in silent mode for a fixed time (parameter "224.03 SilentTmMax")
or until the battery voltage per cell is 0.14 V lower than the set voltage (parameter "222.10
ChrgVtgFlo"). This ensures that the battery is always fully charged, even in silent mode. If a grid failure
is detected during silent mode, the Sunny Island makes a stand-alone grid available within 10 ms to
30 ms.
13.5 Battery Preservation Mode
The Sunny Island has a sophisticated battery preservation mode. The battery preservation mode
prevents deep discharge from the battery as far as possible when the energy supply is low, thus
preventing a total system failure as well as damage to the battery.
The battery preservation mode has three levels that are activated as a result of the battery state of
charge (when the charge falls below the respective limit, "223.05 BatPro1Soc", "223.06
BatPro2Soc" and "223.07 BatPro3Soc" parameter):
Level 1: The first level is used to switch the Sunny Island into standby mode at times when the energy
is not necessarily required (e.g. at night). You define the start time using the "223.01 BatPro1TmStr"
parameter and the stop time using the "223.02 BatPro1TmStp" parameter.
Level 2: The second level of the battery preservation mode ensures that the Sunny Island is started
regularly every two hours only in the time period during which energy supply is expected, and that it
attempts to charge the battery from the AC side. For PV plants, this is during the day. In this case, you
define the start time using the parameter "223.03 BatPro2TmStr" and the stop time using the
parameter "223.04 BatPro2TmStp" parameter.